Hot-blast stove



March 30 1926. 1,578,492

F. H. wlLLcox HOT BL'AST STOVEl FiledMay 17.4 1924 2 sheets-sheet 1March 30 1926.

F. H. WILLCOX HOT BLAST sTovE Filed May 17) 1924 ll v Z5 2 sheetssneet 21,/ V A I 17 'ZZ I. ff

JZ l iv 17l 1 zu ZU 4f 17 Z0 man rar www A u n usefulImprovements-infHot-Blast Stovesgof.'

Patented Mar. 3o, A192e.

,flnrinnrcx II. WILLooX,v F cHI'cAeo, ILLINOIS;Y AssItGNoR'ToFILEYNQasianss'urvi v ppnca'ionyiiieana? 17,1924, seria-info. 713,965.`

To 'alljfwho'v it' 'may concern? n' CoX5 'a' citizen of the UnitedStates, vresiding at" Chicago, in the "county of Cook and' State ofIllinois, havev'invented certain new and Whichthe following is aspeciiicatio'n.

This invention relates toa new and improved 'hot'blast'stoveconstruction5 andV more particularlyto a constructionoi the inner andyarch` YWallsfof the combustion*chamber of such' stoves 'and a Y (ethodof keying the arch Wall into the 'outervvall` f Asat present generally'constructed and used,hot blast stoves comprise tall cylin-V dricalchambers', lined with refractory brick:

Av vcrticalfdivision-Wall is constructed, this Wall 4being larch-ed incross' section and springing from the' lining Wall and With the liningWall forming a combustionchamber lcnticu'larin crossfsection.` lThe'remainder of'i'the Vstoveis lill-edwithbrick `'checker- Work throughyWhich lthe products of. "com`-- bustion pass and which are heated?thereby.

' -Theouter and arch Walls'oijrthe combustion chamber; as nowgenerallyconstructechj comprise-'alternate key and straightbri'cks,the'keys not being made of suchshape as to'permit their exclusive use.vne iire'clay in which the bricks are laid, is gradually v Worked outfrom 'betvveenthe brick. This is due to a minute but continuousalternate Y expansion and contraction of the b'rick'unL derthervariabl-e temperatures` Ymain-tained in* the' combustion chamber, .Ythese tempjeifa- 1 tures varying from* one. thousand' to tv'entylV fourhur'idreddegn'ees'l asV the combustion chamber is'valternately lused forcombustion and for' carryingroi the aiifheatedfin the checkerwork. Thisexpansion` Aand contrac;

tionvworking onthe vlire clay mortar gradul ally loosens itand causes itto: sift out.' A further' factor in thisloosening of the brick consistsin the vibration which is'fset up in the combustion chamber by theascending 'column ofA burning gases Whenburners lare notcorrectlya'djusted. f

COMIANY, 0F c'IIIcAGQILL'INoIs, A CORPORATION o'IiMAINE; u f

. It, has been' founaiiiamuai ,prada tionirrwfhich the'aichwvallis' 1both keyf'and straight'bricks' theastraight.

' the description proceedsig-g .-v

um straight ,bricks Wurfgrauuaiiy workut of the Wall and after Vtheyhave Workedfout;

y adjacent key bricksl IWill Work outsoQthat n large areas of thellcombustionchamber vvall will become insecure;' Largenumbersk of lbrickfa'll out of thearch*Wall and'even.

tuallyy af-hole is opened up into lthe checkers whereupon the checkersalso commence-to fallout. ',On" the vshell side'of 'thefc'oinbustioncha1'n'b'erf,' thelcombustion chamber Wan. land lining-Whig Similarly,fai-1 1:01a

which results in a hot burned spot onfthe .Steel 'shell'of the-stove'V lAnotherf-diiiicultyj with present-.Construcitionsliesi the'factthattlie-inn'eiffor'arch combustion 'chamber Wallis-"not -keyedinto l" Nthe gouter` combustion chamber 'or llininzf'gj lrjzvall'. Consequentlyfunder" the conditions ofvuse vwhichr have beendes'cribed, thereis 'a'ftendi encyxfon the arch" Wall to separate from y the outer y Wallpfi'This' tendency fislfurth erl iiicreasedfby the-fact that theVangleformediii the checker chamber betweenl 'thearcl'i""Wallk and outerlWall is Vusually inerelyflilled'with fl broken brick Which have littlereal-'stability combustion chamber wallslare formed brick #throughoutvvherebyv.V each .bric Mfathevn brick inter being; bonded inra the'iugof key brickf'jjf i" v It', is also anobjectto; provid tion in`which' th'earch walll is keyedI into outer VWalllv ain-their pointsoffzjui'ictjion;

inner fa aHYfShaped-'key brick; 1 Otherand furtlierobj'ects Its isobject-icil they invention to l il p'rovideka new andimprovedliotbla'stisftove construction In! which? the iinnerl fifaces o 'ie f f"It isfan additional object? tofprovidef a conl" 'struction in' whichft-liebuter angl-e betWee'ncO/L- the arclr and liningWalls;isiilledfvvith espe# f l will appear as Figure I have illustrateda preferred embodi ment ofmy invention in the accompanying drawings, inwhich- Figurel is an elevationolla-stove. partly Vbroken away tolshowthe interiorconstruction; v Y

Figure 2 is a fragrmentary horizontal section showing the constructionoi certain courses of the brick in the combustion chamber Walls;

Figure .-3 yis a secti'onsimilarl to Figure 2,'v

but showing the 'arrangementiof brick in other courses; l. Y Y i, f

, Figure 4 is asection on anhenlarged scale taken on line 4-4 of Figure3v; j

. Figure is a perspective View of the longer key brick;

Figurel 71 is via perspective rview Yoit the special key brick. f

y The stove as shownfin Figure 1 comprises ner. v

i Referring now7 toivFigures 2 and 3,y the liningfwall 12 of .thestoveyis composed 'throughout the major; portion of its circumferenceinnFigur'e 2 and `throughout lts cir-4 cumferenceinFigure 3 ofusual-,types of f A4.o

7i .i ing shorter than those comprising the major straights and keysalternately placed;V The '-thinnerportien 18 adjacent the combustion...*chamber in -Figure'` is similarly formed of' alternate' keys andstraights, the keys be? portion lol the wall. Y 1

i e The combustion chamber KVouter wall V19ers ff'shown infFigure3is'composed entirely of'V lthe-long key: -bricksp20 showniin Figure.5.V

fejfAs shown-,in Figure "3, these keys 20 extend v. checker,"chamberaside'. i .f

into-the c .ontourof the outer. lining` wall 12 l of the stoye.- Thearch wall 17,1 as shown in l Figure; 3 com-prisesthek long keyy brick 2Oup'o'n the combustionchamber side and the.

straightbrick r21 laid jas ystretchers'iipon the Figure 2 YYshows thejarrangement in Vother,

. i courses than .those of thev type shown in Fig- Y A chamber wall 19Vis composedof the'short ure 3. I njthis figure the outer combustion4keys2211i? the type shownfin Figure, '5.

'lnhesesv courses abut `against the courses j oi1T the ,lining `Wall, 12which are formed throughout of alternate longkeysand headers. The

arch wall in the courses show-n 'in Figure` 2 comprises an inner.facing. ofthe short keys 22 and the-outerf portion formed of 'straightbricklaid asheaders. Theftypes of courses fshown in'jfFigures 2' andkmay be l l 6 is a lperspective view; of the shorter'key brickgand laidalternately as shown in vertical` section 1n Figure 4.

\ As' shown in Figure 3, the left endof the l arch wall 17 extends intoand `across the outer wall 19. The right end of the arch wall 17 restsagainst Vthe face of the outer wall 19 which latter 'extends across thearch wall. In the courses shown in Figure 2 the` bonding is reversed theright endv of the arch wall. extending'across the, outer Vwall and theVleft endy of the outerywall across the arch wall, The angle formedinvrthgvveheeker Chamber between the. arch wallV 17 aidfthe outerlining-'wall 12 is Yilled l.by the special. key bricks 24. These brickare made especially to lit the particular coniiguration of .thislocation It is to be y alternately with straight brick in the AzoutenAlin-ing" wallof the stove, are notfsimi'vlar te under-stood that thekeys used j ssV the keys 2Ok or122. These lining wall keys V. l

are of usual standardconstruction and are not made in theproperproportionsto be used without ,the'alternationof a certain numberof straights in order Vto form' a connV pact wallfor the usual sizeofstovesgj The special keys 20 and 22,; however, are espe-1 ciallydesignedfor the ,arch` into which .they

are built and formthese walls without the necessity ofthe useof any.straights` Thus ing action of' the adjacent bricks;` Conso-r quently nosingler brick can work out of the wall. VMy method of bonding the endsof separation yof Ythe arch Vand outer walls with .95"k .l each oneofthe keybrick inthecombustion 'l f' j chamber wall is retained linplace by the keythe arch wall into the outer-wall}prevents Y consequentlosses. This bondingv is further strengthened by means of the solid keysY2,4

which fullyand compactly fill Ithe adjacent angle.A l

Iclaim:V 'Y s 1.4 A'Ina hot blast stovearch wall construction aplurality of courses, each' courseconri-l prising a face portion yformedof bricks seg-A mental in plan 'whereby each brickis held` againstinward :movement by engagementf with the adjacent bricks and "a backingponVI 1 tioirfornriedv of straightbric'ks. f Y. i

2. In a hot blast stove arch wall 'construe-f prising aface-portionformed of bricks seg- V tion a.` pluralityof courses,eachcourse com; f

mental in plan wherebyeach brick is heldV against inwardl movement byengagement `i'v'ith theladjacent bricks and a backing pori tion formedvoi'' straight vbricks,the segmen- Ital bricks on certainV coursesVbeing.shorter than those on` other courses, the straight brick behindthe shorter segmental bricks being laidl as headers and behind theyother Vsegmental bricksl being .laid as stretchers whereby the face andbonded@ 1 Y 3.5 In a hot Ablast stove-Combustion chaine ber wallconstruction, outer,v and arch walls backing portions are n veachcomprising a `plurality of courses oi of theadjacentfwall andspecial'fllbricks bricks' segmental in plan whereby each solidly fillingthe angle in the checker chan1- 10l I brick is held against inwardmovement by ber formed by the junction ofthe arch andy engagement withthe adjacent bricks, the vouter Walls. f j v 5 outer and arch Wallsbeingbonded by hav- Signed at Chicago, Illinois, this 14 day of ing alternatecourses of the end eachvwall May, 1924. 1 butting the adjacent Wall andthe intermer diate courses extending through thexdepth FREDERICK Y v ,vi"

Certificate of Correction.

It is hereby certiied that the assignee in Letters Patent No. 1,578,492,granted March 30, 1926, upon the application of Frederick H. Willcox, ofChicago, Illinois, for an improvement in Hot-Blast Stoves, waserroneously described and specied as Freyn, Brassert & Company,7Whe-reas said assignee should have been described and specified asFrey/u Engineering Company, as shown by the records of assignments inthis oiiice; and that the said Let-ters Patent should be read With thiscorrection therein that the saine may conform to the record of the casein the Patent Ofiioe.

Signed and sealed this 18th day of May, A. D. 1926.

[SEAL] M. J. MOORE,

' Acting ommz's'sone of Patents.

